<template>
    <div class="app-container">
        <el-form label-width="120px">
            <el-form-item label="讲师名称">
                <el-input v-model="teacher.name"/>
            </el-form-item>
            <el-form-item label="讲师排序">
                <el-input-number v-model="teacher.sort" controls-position="right" :min="0"/>
            </el-form-item>
            <el-form-item label="讲师头衔">
                <el-select v-model="teacher.level" clearable placeholder="请选择">
                    <el-option :value="1" label="高级讲师"/>
                    <el-option :value="2" label="首席讲师"/>
                </el-select>
            </el-form-item>
            <el-form-item label="讲师资历">
                <el-input v-model="teacher.career"/>
            </el-form-item>
            <el-form-item label="讲师简介">
                <el-input v-model="teacher.intro" :rows="10" type="textarea"/>
            </el-form-item>

            <!-- 讲师头像 -->
            <el-form-item label="讲师头像">

                <!-- 头衔缩略图 -->
                <pan-thumb :image="teacher.avatar"/>
                <!-- 文件上传按钮 -->
                <el-button type="primary" icon="el-icon-upload" @click="imagecropperShow=true">更换头像
                </el-button>

                <!--
                    v-show：是否显示上传组件
                    :key：类似于id，如果一个页面多个图片上传控件，可以做区分
                    :url：后台上传的url地址
                    @close：关闭上传组件
                    @crop-upload-success：上传成功后的回调 
                        <input type="file" name="file"/>
                    -->
                <image-cropper
                                v-show="imagecropperShow"
                                :width="200"
                                :height="200"
                                :key="imagecropperKey"
                                :url="BASE_API+'/eduoss/fileoss'"
                                field="file"
                                @close="close"
                                @crop-upload-success="cropSuccess"/>
            </el-form-item>

            <el-form-item>
                <el-button :disabled="saveBtnDisabled" type="primary" @click="saveOrUpdate">保存</el-button>
            </el-form-item>
        </el-form>
    </div>
</template>
<script>
import teacherApi from '@/api/edu/teacher.js'
import ImageCropper from '@/components/ImageCropper'
import PanThumb from '@/components/PanThumb'
export default {
    components: { ImageCropper, PanThumb },
    data(){
        return{
            teacher:{
                name:'',
                sort:0,
                level: 1,
                career: '',
                intro: '',
                avatar: ''
            },
            imagecropperShow:false,  // 保存按钮是否禁用,
            //上传弹框组件是否显示
            imagecropperKey:0,//上传组件key值
            BASE_API:process.env.BASE_API, //获取dev.env.js里面地址
            saveBtnDisabled:false  // 保存按钮是否禁用,
        }
    },
    created(){
        this.init()
    },
    watch: {  //监听
        $route(to, from) { //路由变化方式，路由发生变化，方法就会执行
            this.init()
        }
    },
    methods:{
        close() { //关闭上传弹框的方法
            this.imagecropperShow=false
            //上传组件初始化
            this.imagecropperKey = this.imagecropperKey+1
        },
        //上传成功方法
        cropSuccess(data) {
            this.imagecropperShow=false
            //上传之后接口返回图片地址
            this.teacher.avatar = data.url
            this.imagecropperKey = this.imagecropperKey+1
        },
        init() {
            //判断路径有id值,做修改
            if(this.$route.params && this.$route.params.id) {
                //从路径获取id值
                const id = this.$route.params.id
                //调用根据id查询的方法
                this.getInfo(id)
            } else { //路径没有id值，做添加
                //清空表单
                this.teacher = {}
                this.teacher.avatar = 'https://huzhenhua.oss-cn-beijing.aliyuncs.com/touxiang/upload.jpg?versionId=CAEQExiBgMDWu.HmvRciIDFjMjEwNDk5MWViMzRmNzVhYjkzYTU4NTc5ZTQ5OTIx'
            }
        },
        updateteacher(teacher){
            teacherApi.updateTeacher(this.teacher)
            .then(response => {
                //提示信息
                this.$message({
                    type: 'success',
                    message: '修改成功!'
                });
                //回到列表界面，路由跳转
                this.$router.push({path:'/teacher/table'})
            })
        },
        saveOrUpdate(){
            //判断是修改还是添加
            //根据teacher中是否有id来判断
            if(!this.teacher.id){
                this.saveTeacher()
            }else{
                this.updateteacher()
            }
        },
        
        //添加讲师的方法
        saveTeacher(){
            teacherApi.addTeacher(this.teacher)
                .then(response => {
                    //提示信息
                    this.$message({
                        type: 'success',
                        message: '添加成功!'
                    });
                    //回到列表界面，路由跳转
                    this.$router.push({path:'/teacher/table'})
                })
        },
        //查询讲师的方法
        getInfo(id){
            teacherApi.getTeacherInfo(id)
                .then(response =>{
                    this.teacher = response.data.teacher
                })
        },
        //根据讲师id查询的方法
        getInfo(id) {
            teacherApi.getTeacherInfo(id)
            .then(response => {
                this.teacher = response.data.teacher
            })
        },
    }
}
</script>